taylor



Jan. 13, 1931. P. B. TAYLoR, l,-7, 8,897

CRANKGASE VENTILATION Filed Marc!! 10, 1927 Patented Jan. 13, '1931 PAUL B. TAYILon, or r'oN'rIAc, MIGHIGAN, Assieivon? 'ro GENERAL ivrorons ''conifnta` mon, or nnfraoir, MIGHIGAN, A-conror'*.'-n::io1vforl :DELAWARE f I *g `appnea'ioamea March io, 19241. senat-No. 174,389. i ,A

c. s 'inaicaesthe 'an finef tube Whh. &aja;

This invention relates to crank case ventilating systems of the type disclosedin the application of l/V. S. Cochrane, Eer. No. 112,625, iiled May 29th, 1926. VIn 'that application there is disclosed a fan blast operated ejector arranged to produce an aspirat-V mg action on a conduit leading to the cranl:

case, the conduit preferably being a branch' of the usual oil filler tube. By this means .he gases and vapors, principally water va.-

por and fuel components, which have found their way into the crank case from the com! bustion Chamber and which, if permitted to.

'remaim would condense and dilute the Ien)- gine oil are drawn out of the cranl; case for' discharge at any suitable place e. g. under the car, where the .odors cannot reach the passengers. The vapors thus removed are replaced by cleanl airtentering the crank case ata. point remote from the aspirator.v

One feature of my invention'consists in Acombining with anl aspirator of this type a A separator to remove partlcles of oil from the issuinova' ors prior to their assave into `he ejector to conserve the engine oil supply.

The separator is preferably of the centrifence Vwith air flow. I have lilrewisesopar;V ranged my separator thatthe recoveredoil drains back to the crankicase Athrough. the conduit from Which the vapors emerge.

Anotherfeature of my invention consistsv ofan improved construction of screened cap for'thefinlet opening through Which clean air is supplied tothe crankcase,

, In. the drawings'Figure lis' a side elevation of an automobile engine to which my ventilating system is shown applied,V the cap broken away.

jmodified form of cap fjtor the air-inlet opening beingshown in section. o i p Figure 2 is a front'elevation'with parts Figure Sis a. sectionV on line 3-43 of FigureV 1.'

Figure 4 is. a vertical section :through a or` shroud for the clean air inlet.

Thereference character 2 indicates an automobile en'ineof conventional tv e ro- 'videdwith a crank case 4 and a 'Cooling fan ,collecting jupon .the casingmwallf and `idrain back tothelcrank casethroughflthe.samelpassfi centitsbasefisiprovided with a branchlO communicating tangentially with aH I' cylinhaust do not reachjtheloccupaiits of Vthe car. .I i?

The. ca'sing 12 is'tiltedf reanvardlyA as shown f i to draln recovered oilLback into';tl1ecranl; case.

At 20 II have shown anV air Iinletconduit,

preferably ``spaced the length of the engine from, rth,e1outlet conduitiso as to v,insurefta thjoroughmixing of air withi the Vcrajnltcase contents. To. the upper endof'the'conduitr issecured a stamping 32, on whichis mount ed by "means `of bolt .34, 'a cap or' liood havingffa dependingskirt 88 overlying ithe conduit 20. To the skirt 38 Visf'Seclired"in spaced relation Vbymeans of'suitable arms,

aniannulus 40 Vsurroui'i di'ng thezair inlet conclultf 'Between the annulusandfthe ,'capmvis'.

Varra'nged a screen 42.

-, With the; described construction air enter-I;

drawn to the forwardencl of Vthe engine by. passing' tange'ntially into the Vcasing v'12,5 the4 i heavy particles V'of oilarev thrown voutn'zardly,

Vthe iaspiratingleffect f of the .fanl blast, and i sages' 10V and'8,fth'rough whichy airleavesuthe crankcase. The air vfrom the crank case. i

In Figure 41 Vhave shown a sli'ghtly modi; i

`fied form 'of airf inletfcap, 'thisiconsisting ofV discharged Aunder the'engine.

a screeni-carrying'member 44 clamped to' a conduit l46 communica ting. with the crank 95,4

caseby means of bolt' 48 and cap '50; The' member 44 carries a .dependingskirt 52. In

clirt'while the screen removes the finer parthisvand the 'other form of ,inlet,V the lskirtV I s i rserves Vto exclude large particles of dustand ticlesbyfilt'ra-tionV As the air enters t-hellfmi crank case at relatively low velocity cleaning by this simple means is quite effective.

i In the following claimsV I have referred to the gases Withdrawn fromtthe crank'case as air in the interests ofsimplicity in terminology but it is to beV understood that I have V reference to the complex kgaseous mix-ture present in the crank casa This invention is susceptible of considerable modificatlon as suggestedby the omls- Sion of various lilustratedelements in the structures called for by the claims Iclaim:

1. An engine having a crankcase, a port for admitting air to the crankCaSe, Ia port for? the discharge of air from the crankcase, a cylindrical casing, saidiast named port communicatin'g tangentially With said casing at one end thereof, and a blast operated injector extending" centrally through the casin'g and communicating With the interior thereof at the other end of the casing. v I

' 2. The combination of 'an engine having'a i crankcase provided'with an air inlet, and an commumcatlng With the casing at one end o, i thereof, saldcasin'glhavingandaxial air outlet tube extendlng'into the casing, and an 1n- Y air outlet, a cylin'drical casing, said outlet jector extending into the casing from the opposite end thereofandhaving 1ts`1nner end ispaced fromzthe outlet. to induce floW of vvap` o'rs from Jthe crankcase through the casingand into the outlet tube.`

*3. 'The combination of an engine havinga crankcase Vpmvided 'With an air inlet, an i nclined cylindrical casingi-having at its lower end 'a 'tangential air iniet connected 'to the vcranlrcase and serving as the crankc'ase {outlet, anaxial* air outlet extending into the casing, Iand :anfinjec'tor extending into the other end of the casing in aXial` Valinement WithV said axial air outl'et'butspaec'ed therefrom'to i provide ani asirator to remove vapors from the crankcase..

4. The combinationof a cylindrical casing i, 'having at one' end .a tangential va]oor 1n1e ,t,- V said casing being provided Wlth a vapor d1sf charge tube extending in an Jaxial direction into the casing,` aninjectorextendlng,1nto

the casing fromtheoppositeend and having itsi-nner'end spaced fromthe inner end offj thefvapor :outiettub'e to inducea circulation i Vof vapors through thefcas'ingand 'out the vapor outle't, said vaporsperforming a'WhirL .ing motion in theirtravel throughV the casing to .effect separati'on offoreign particles by centrifugai action. 1

In testimonywhereof I mysignaturef PAUL B .TAYLQBW 

